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Table 2

Log of spectroscopic observations of VFTS 450.

Setting MJD Orbital Primary radial velocities (kms-1) Secondary
Phase He i He i Si iii RV (kms-1)
λ4387 λ4471 λ4552 Mean s.e. He ii λ4200
UVES 54 761.2275 0.99 466.9 460.7 468.6 465.4 2.4
UVES 54 761.2491 1.00 483.1 466.0 474.6 474.6 5.0
UVES 54 761.2772 0.00 468.2 476.6 455.1 466.7 6.3
UVES 54 761.2995 0.00 469.6 460.7 457.7 462.7 3.6
UVES 54 767.2738 0.87 401.9 385.0 413.6 400.1 8.3
UVES 54 767.2954 0.87 381.6 383.6 399.3 388.2 5.6
UVES 54 845.1671 0.17 347.7 355.7 324.0 342.5 9.5
UVES 54 845.1888 0.18 349.1 358.4 319.8 342.4 11.6
UVES 54 876.1214 0.66 131.1 123.3 117.6 124.0 3.9
UVES 54 876.1430 0.67 128.4 128.6 116.3 124.4 4.1
UVES 55 172.2807 0.63 116.2 115.3 115.0 115.5 0.4
UVES 55 172.3024 0.64 118.9 111.3 99.4 109.9 5.7
UVES 55 173.2985 0.78 288.2 280.0 283.8 284.0 2.3
UVES 55 173.3201 0.78 293.6 285.3 287.7 288.9 2.5
UVES 55 178.1555 0.49 53.9 52.9 49.7 52.2 1.3
UVES 55 178.1772 0.49 52.5 55.5 57.4 55.2 1.4
LR02 54 748.2657 0.11 399.2 403.6 387.6 396.8 4.8 }134
LR02 54 748.2873 0.12 404.6 399.6 386.3 396.8 5.5
LR02 54 748.3115 0.12 393.8 395.6 377.2 388.9 5.8
LR02 54 748.3332 0.12 410.0 398.2 381.1 396.5 8.4
LR02 54 749.2121 0.25 246.2 ··· 228.0 237.1 9.1
LR02 54 749.2337 0.25 240.8 236.2 224.0 233.7 5.0
LR02 54 837.1223 0.01 462.8 466.0 460.3 463.0 1.6 }157
LR02 54 837.1440 0.01 468.2 463.3 462.9 464.8 1.7
LR02 54 868.0461 0.49 43.0 51.5 28.0 40.9 6.9 }400
LR02 54 868.0677 0.50 45.8 47.5 28.0 40.4 6.2
LR02 55 112.3016 0.93 450.6 443.4 456.4 450.2 3.8 }175
LR02 55 112.3232 0.93 454.7 443.4 456.4 451.5 4.1
LR02 56 210.3545 0.25 243.6 236.4 223.7 234.6 5.8
LR02 56 210.3665 0.25 243.4 236.4 214.6 231.5 8.7
LR02 56 210.3785 0.25 245.5 230.5 230.1 235.4 5.1
LR02 56 217.3299 0.26 219.8 211.2 212.1 214.4 2.7
LR02 56 217.3419 0.26 221.7 207.5 198.1 209.1 6.9
LR02 56 217.3538 0.26 217.3 206.2 219.5 214.3 4.1
LR02 56 243.3377 0.03 456.1 457.2 435.2 449.5 7.2 }140
LR02 56 243.3497 0.03 456.0 458.8 461.5 458.8 1.6
LR02 56 243.3616 0.04 455.5 457.8 438.0 450.4 6.3
LR02 56 256.2607 0.91 431.4 415.0 445.6 430.7 8.8 }115
LR02 56 256.2727 0.91 432.6 414.1 436.0 427.6 6.8
LR02 56 256.2846 0.91 425.5 412.7 440.4 426.2 8.0
LR02 56 257.1301 0.03 460.9 463.2 457.9 460.7 1.5 }86
LR02 56 257.1421 0.03 465.9 460.0 469.2 465.0 2.7
LR02 56 257.1541 0.04 463.1 460.8 430.1 451.3 10.6
LR02 56 277.3081 0.96 474.3 459.5 487.0 473.6 7.9 }146
LR02 56 277.3201 0.96 467.9 455.6 469.3 464.3 4.4
LR02 56 277.3320 0.96 475.2 459.4 493.2 475.9 9.8
LR02 56 283.0488 0.79 301.1 288.0 293.2 294.1 3.8
LR02 56 283.0608 0.80 304.0 284.3 297.5 295.3 5.8
LR02 56 283.0728 0.80 305.5 287.2 302.6 298.4 5.7
LR02 56 294.1990 0.41 90.8 79.8 99.7 90.1 5.8 }392
LR02 56 294.2134 0.41 87.1 82.7 106.6 92.1 7.3
LR02 56 294.2254 0.42 88.1 81.9 94.1 88.0 3.5
LR02 56 295.1816 0.55 63.5 63.5 61.0 62.7 0.8 }437
LR02 56 295.1935 0.56 67.1 64.0 61.9 64.3 1.5
LR02 56 295.2055 0.56 68.9 67.9 44.8 60.5 7.9
LR02 56 304.2360 0.87 378.0 366.7 381.7 375.5 4.5
LR02 56 305.2315 0.01 466.2 461.2 428.2 451.9 11.9 }173
LR02 56 305.2435 0.01 473.3 464.0 468.8 468.7 2.7
LR02 56 305.2555 0.02 472.3 459.7 ··· 466.0 3.6
LR02 56 306.2189 0.16 367.7 366.3 359.7 364.6 2.5
LR02 56 306.2309 0.16 350.7 367.7 317.3 345.2 14.8
LR02 56 306.2429 0.16 356.9 360.8 339.8 352.5 6.4
LR02 56 308.1546 0.44 80.2 69.0 119.6 89.6 15.3 }323
LR02 56 308.1666 0.44 87.2 71.3 87.7 82.1 5.4
LR02 56 308.1786 0.44 84.0 66.9 71.8 74.2 5.1
LR02 56 316.2052 0.60 94.1 87.6 76.0 85.9 5.3 }332
LR02 56 316.2172 0.61 92.4 92.6 81.1 88.7 3.8
LR02 56 316.2292 0.61 94.0 91.6 79.0 88.2 4.7
LR02 56 347.0132 0.07 444.9 441.1 420.1 435.4 7.7 }132
LR02 56 347.0251 0.08 441.2 438.3 462.3 447.3 7.6
LR02 56 347.0371 0.08 437.6 434.3 416.1 429.3 6.7
LR02 56 349.0214 0.37 109.2 88.5 105.1 100.9 6.3 }347
LR02 56 349.0334 0.37 107.5 92.8 108.1 102.8 5.0
LR02 56 349.0453 0.37 99.8 91.9 95.1 95.6 2.3
LR02 56 352.0241 0.80 289.7 271.1 279.1 280.0 5.4
LR02 56 352.0360 0.80 291.9 269.7 282.6 281.4 6.4
LR02 56 352.0480 0.80 296.8 278.4 280.4 285.2 5.8
LR02 56 356.0044 0.38 90.7 83.9 91.5 88.7 2.4 }339
LR02 56 356.0163 0.38 95.3 81.2 90.8 89.1 4.2
LR02 56 356.0283 0.38 92.6 79.0 65.4 79.0 7.9
Si iii He i He i
λ4552 λ4713 λ4922
LR03 54 755.1987 0.12 387.0 399.3 402.7 396.3 4.8
LR03 54 810.2265 0.10 412.4 423.2 433.8 423.1 6.2
LR03 54 810.2481 0.11 410.5 423.7 425.3 419.8 4.7
LR03 54 810.2699 0.11 409.6 422.1 419.7 417.1 3.8
LR03 54 810.2915 0.11 404.9 415.6 419.6 413.4 4.4
LR03 54 810.3248 0.12 395.2 414.2 412.6 407.3 6.1
LR03 54 810.3465 0.12 394.2 427.0 413.5 411.6 9.5

Notes. Orbital phases are with respect to the circular-orbit ephemeris in Table 5. The velocity measurements are described in Sect. 3.1.

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